EUCHNER EKS FSA with USB Interface - Manual (Page 41)

Manual EKS Electronic-Key Adapter USB
094485-04-11/13 Subject to technical modifications Page 41/44
8.4.2 Read process
Command message (message core, PC
→ EKS, see Figure 4):
 TL (device addr.) (start addr. user data) (number of bytes of user data)
Reply message (message core, EKS
→ PC, see Figure 5 or Figure 6):
For this command there are two possible replies:
 RL (device addr.) (start addr. user data) (number of bytes of user data) (user data)
or
 RF (device addr.) (00
hex
,00
hex
) (status number)
The reply message RL (see Figure 5) stands for correct reception of the data.
If an Electronic-Key cannot be read, an RF reply message is received (see Figure 6). The status number then
indicates the cause of the error.
Byte no. Description
Contents
ASCII hexadecimal decimal
0 Number of message bytes 07 7
1
2
Command identification
T
L 54
4C
84
76
3 Device address 01 1
4
5
Start address for the user data
00
00 ... 73
0
0 ... 115
6 Number of bytes of user data 01 ... 74 1 ... 116
Figure 4: Command message read from read/write Electronic-Key (message core)
Byte no. Description
Contents
ASCII hexadecimal decimal
0 Number of message bytes 08 ... 7B 8 ... 123
1
2
Command identification
R
L
52
4C
82
76
3 Device address 01 1
4
5
Start address for the user data
00
00 ... 73
0
0 ... 115
6 Number of bytes of user data 01 ... 74 1 ... 116
7 ... 122 User data ASCII or hexadecimal or BCD (code transparent)
Figure 5: Reply message read from read/write Electronic-Key (message core)
Byte no. Description
Contents
ASCII hexadecimal decimal
0 Number of message bytes 07 7
1
2
Command identification
R
F
52
46 82
70
3 Device address 01 1
4
5
Padding data
00
00 0
0
6 Status number *
Figure 6: Reply message read from read/write Electronic-Key - status (message core)
* Status number 02
hex
: Electronic-Key not in the operating distance
(For further status numbers see section 8.6)